Something bad is happening to her at school, something quite bad judging from the severity of her aversion. It could be severe bullying, or it could be abuse, possibly sexual.

I would try to get her to talk about it to figure out what it is. Offer to allow her to stay out of school for gym days for a couple of weeks, or to stay out of school entirely for a week. If questioned, tell the school you are concerned about possible abuse, possibly by school staff, and you want it resolved before sending her back in. Call the hotline at the site someone mentioned in the comment - https://www.nspcc.org.uk/what-you-can-do/report-abuse/

If you can't find out what the problem is, change schools. She isn't objecting strongly, and it's likely the problem involves specific people, who won't be at the new school. It's not a guaranteed fix, but it should at least help.

Something bad is happening to her at school, something quite bad judging from the severity of her aversion. It could be severe bullying, or it could be abuse, possibly sexual. It likely has a physical aspect given it seems to center on PE.

I would try to get her to talk about it to figure out what it is. Offer to allow her to stay out of school for gym days for a couple of weeks, or to stay out of school entirely for a week. If questioned, tell the school you are concerned about possible abuse, possibly by school staff, and you want it resolved before sending her back in. Also call the hotline at the site someone mentioned in the comment - https://www.nspcc.org.uk/what-you-can-do/report-abuse/

If you can't find out what the problem is, change schools. She isn't objecting strongly, and it's likely the problem involves specific people, who won't be at the new school. It's not a guaranteed fix, but it should at least help.

Something bad is happening to her at school, something quite bad judging from the severity of her aversion. It could be severe bullying, or it could be abuse, possibly sexual.

I would try to get her to talk about it to figure out what it is. Offer to allow her to stay out of school for gym days for a couple of weeks, or to stay out of school for a week. If questioned, tell the school you are concerned about possible abuse, possibly by school staff, and you want it resolved before sending her back in. Call the hotline at the site someone mentioned in the comment - https://www.nspcc.org.uk/what-you-can-do/report-abuse/

If you can't find out what the problem is, change schools. She isn't objecting strongly, and it's likely the problem involves specific people, who won't be at the new school. It's not a guaranteed fix, but it should at least help.

Something bad is happening to her at school, something quite bad judging from the severity of her aversion. It could be severe bullying, or it could be abuse, possibly sexual.

I would try to get her to talk about it to figure out what it is. Offer to allow her to stay out of school for gym days for a couple of weeks, or to stay out of school entirely for a week. If questioned, tell the school you are concerned about possible abuse, possibly by school staff, and you want it resolved before sending her back in. Call the hotline at the site someone mentioned in the comment - https://www.nspcc.org.uk/what-you-can-do/report-abuse/

If you can't find out what the problem is, change schools. She isn't objecting strongly, and it's likely the problem involves specific people, who won't be at the new school. It's not a guaranteed fix, but it should at least help.